Brake-shoe.



No. 785,303; PATENTED MAR. 21,1905.

J. DQGALLAGHER.

BRAKE SHOE.

APPLICATION FILED MAY 3, 1904.

2 BHBETB-SEEET z.

Patented March 21, 1905.

PATENT OFFICE.

JOSEPH D. GALLAGHER, OF GLENRIDGE, NEW JERSEY.

BRAKE-SHOE.

SPECIFICATION forming part of Letters Patent No. 785,303, dated March21, 1905.

Application filed May 3, 1904. Serial No. 206,184.

To all whom, it may concern,-

Be it known that I, JOSEPH D. GALLAGHER, acitizen of the United States,residing at Glenridge, in the State of New Jersey, have invented certainnew and useful Improvements in Brake-Shoes, of which the following is aspecification.

My invention relates to the wearing blocks or shoes of railway brakesand the like, and particularly to brake shoes which have a duotilebinding or retaining back with a cast wearing sole and means forsecuring the shoe to the brake head. The objects of the invention are,to provide a detachable back and key lug on a cast wearing sole; toprovide superior malleable attaching lugs made integrally with thebinding back, capable of being removed and used over again when the soleis Worn out; to provide a detachable binding steel back which can beapplied upon any form of shoe; and to generally improve the structureand efliciency of brake shoes. These objects, and other advantages whichwill hereinafter appear, I attain by means of the constructionillustrated in preferred forms in the accompanying drawings, wherein-Figure 1 isaperspective view showing separately the three parts of oneform of my improved shoe;

Figure 2 is a central longitudinal section of the assembled brake shoe,showing the attaching key in place in the lugs and the brake headindicated by dotted lines;

Figure 3 is a transverse section of the shoe and back taken on line (3)of Figure 2;

Figures 4 and 5 are respectively, a central longitudinal section and atop plan view, of a modified form of the removable back wherein it isall made in one piece;

Figure 6 is a cross-sectional view taken 0 line (6) in Figure 4:, and

Figure 7 is an end elevation taken in the direction indicated in Figure4 by the arrow In the making of brake shoes in which the wearing sole iscast or compound and is supplied with a binding back of steel or othermalleable metal, it has been customary to embed the steel back in themetal of the sole in the casting. This results in making the backuseless after the shoe is worn out and also deteriorates the quality ofthe metal of the back during the casting, and has various otherdisadvantages. It will be seen from Figures 1 to 3 that in my preferredform I have made the brake-shoe 8, (which may be cast, or of anymaterial desired or have inserts or fragments of steel therein, as thecase may be), and provided on its back and integrally therewith in thecasting, a raised lug 9 extending along almost the entire length andhaving enlarged ends 10 for seating the end of the brake head, the samebeing undercut at 11, and the sides of the lug all around being undercutat 12 as shown more clearlyin Figure 3.

' The back 13 is preferably made of steel plates in the form shownclearly at Figure 1, the back being composed of two parts 13 which havethe central cutout portions 14 with edges slanting to co-operate withthe undercut groove 12 of the shoe lug 9 and provided at the ends withupturned lugs 17 to confine the brake head and at the middle beingformed with two upturned lugs 15 whichhave notches 16 out out thereinfor the reception of the brake shoe key 20, as shown more clearly inFigure 2. It will be observed that the lug 9 is wide at the-middle andnarrow at the ends, and the openings 14 in the backing 13 arecorrespondingly of the same shape, so that when the two parts 13 aredriven together toward the center they are wedged in place upon the lug9 and the undercut portion'll of the seat 10 engages the end of theopening 14, thus securing the back thoroughly in place along its entirelength. When the shoe is put in place in the head it will be observedthat the wedge-shaped notch in the head which receives the two lugs 15,presses them together toward the center and holds them tightly inposition while the lug retains a resilient contact with the notch in thehead, and tightens the two portions of the back firmly in place when thepin 20 is driven home. It will be noted that in the action of the shoeupon the wheel the pressure of the body part 8 in either direction willmore firmly wedge the lug 9 upon the steel back, and the attachment ofthe head to the shoe is resilient throughout so that rattling andlooseness are avoided.

ings 14 at the two sides are formed as before, and the ends haveupwardly bent lugs 17 to engage the seating head 19 of the brake head,

and also tongues 23 punched out of the plate and bent upward to give abetter and more resilient seating of the brake head upon the shoe. Inattaching this form of back to the cast shoe it will be understood thatthe bend of the central lug 22 is at first made much wider, spreadingthe two wings of the back, apart so that the openings 14 can go on thelug 9, and then the two parts of the bend 22 are pinched up together soas to draw the wings together and thoroughly wedge the openings 14 uponthe lug 9, as will be understood. This drawing toward the center of bothwings of the back is increased when the lug 22 is drawn in its place inthe wedgeshaped notch in the brake head 18, and it will be understoodthat when it is desired to remove the back this can be done by spreadingthe bend 22 to widen it out so as to laterally separate the two wingsand relieve the edges of openings 14 from engagement with the undercutsides 12 of the lug 9 on the cast sole.

In both forms of the construction it will be observed that the back isattached directly to the shoe by an integrally cast portion alongpractically its entire length and at the same time the wearing sole maybe worn out completely, when the back may be used over and over; and itwill be understood of course that the lug 9 may be formed upon the backof any form of cast shoe desired, and consequently. the same back may beused with a great variety of wearing soles. The steel back engages theWhole shoe body, but is removable when desired, as in case of accidentalbreaking of the shoe, and has all the advantages of a binding backfixedly cast into the shoe, while also avoiding injury to the quality ofthe metal of which the back is composed. The resiliency of the attachinglugs and seats for the ends of the brake head secures a' good fit andprevents rattling. For the purpose of retaining the back better inplace, before the shoe is put in the head, and especially duringtransportation,'the body may be provided with a series of embedded wirenails or rods 24, which are bent up to engage the back, as shown inFigure 2, or may engage notches a in the side, as in Figure 1.

A modification of this invention, in which the body of the shoe hasunder-cut grooves and the back is made to engage by its outside edges,is shown in my co-pending application No. 206,135.

Having thus described my invention and illustrated its use, what I claimas new, and desire to secure by Letters Patent, is the following:

, 1. A brake shoe having adetachable binding back engaging with the bodyof the shoe.

2. A brake shoe having a detachable back made in two parts and forming abinder for the shoe.

3. A brake shoe having a back detachably engaging with the wearing soleand provided with lugs to engage the brake head.

4. A brake shoe comprising a cast body portion and a detachable steelback having thereon integral attaching means for the brake-head.

5. A brake shoe composed of a cast body and a two-part detachable back,the several parts havingmeans for fixing them together.

6. A brake shoe having a detachable binding steel back provided withintegral key lugs and end lugs for engaging the brake head,substantially as described.

7 The combination in a brake shoe of a wearing sole having an undercutlug thereon, and a removable malleable metal back engaging said lugalong its length and ends, and having integral attaching lugs forengagement of the brake head.

8. A brake shoe body having a tapering undercut lug on its back and asteel binding back attached to the body by wedge-shaped openingsengaging said lug, substantially as described.

9. The combination with a brake shoe body having a double wedge-shapedlug on its back, of a steel back provided with wedge-shaped openings toengage said lug and tightenedthereon by drawing the two parts toward thecenter of the shoe, substantially as described.

10. A brake shoe comprising a cast body having a malleable binding back,the body and back engaging each other by a co-operatingtongue-and-groove.

11. A brake shoe having a detachable back with resilient lugs thereon.

In testimony whereof I have hereunder signed my name in the presence ofthe two subscribed witnesses.

JOSEPH D. GALLAGHER.

Witnesses:

PAUL CARPENTER, EDWARD C. BURNS.

